PM3.02 - Marth - Common Subroutine 0x21b38

1. if ((RandomAccessInt (0x0) GreaterThanOrEqual scalar(0)))
   1. IntVariableDecrement { variable: RandomAccessInt (0x0) }
   2. if ((RandomAccessInt (0x0) LessThan scalar(0)))
      1. ReverseDirection
2. if ((RandomAccessInt (0x1) GreaterThanOrEqual scalar(0)))
   1. IntVariableDecrement { variable: RandomAccessInt (0x1) }
   2. if ((RandomAccessInt (0x1) LessThan scalar(0)))
      1. DisableInterrupt(10106)